反应详情

温度

150 °C

To a stirred solution of 2-chloro-7-fluoro-6-methoxyquinoline-3-carbaldehyde SMA 44034 (219 mg, 0.91 mmol) in THF (10 mL) in a 20 mL microwave vial equipped with a magnetic stirrer was added ethylamine (2 M in THF, 4.50 mL, 9.00 mmol) and the mixture was stirred at 150° C. for 2 h under microwave irradiation. After cooling to RT, the volatiles were removed under vacuum at 40° C. and the resulting yellow oil was taken up in a 2 N aq. HCl solution (15 mL) and stirred for 15 min at RT then neutralised with a 2 N aq. NaOH solution (15 mL). The mixture was extracted with CH2Cl2:MeOH=9:1 (50 mL) and the organic phase was washed with brine (10 mL), dried over Na2SO4, filtered, and concentrated at 40° C. under vacuum. Purification by column chromatography (SiO2, eluent cyclohexane:EtOAc=100:0 to 75:25) gave 2-(ethylamino)-7-fluoro-6-methoxyquinoline-3-carbaldehyde CCH 42068 as a yellow oil (105 mg, 46% yield).

1. temperatureAfter cooling to RT
2. customthe volatiles were removed under vacuum at 40° C.
3. stirringstirred for 15 min at RT
4. extractionThe mixture was extracted with CH2Cl2
5. washMeOH=9:1 (50 mL) and the organic phase was washed with brine (10 mL)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated at 40° C. under vacuum
9. customPurification by column chromatography (SiO2, eluent cyclohexane:EtOAc=100:0 to 75:25)